Just wanted to start out with it looks fabulous! The colours really make her pop to the front of your focus, particularily her red hair. Absolutely wonderful detail in her design and the background. The tilted horizon line adds to the dynamics of the image.

I did notice though that her foremost thigh (the bent one) looks a bit thin, maybe something to do with the foreshorting? And the same leg is smaller then the one behind it by quite a bit (mostly in the thickness of it). Just looks odd if you notice it. Last her empty hand is very dynamic but feals really tense for a relative casual gesture. feals broken like you're twisting her wrist a bit too much.

Thought i'd give some feedback for the great image but i apologize if you feal i'm out of line. Great pic.

I will not go into the art of how you created this because that is beyond me. I don't know how to create these stuff so no point to assess it. I can only talk about my impressions. Now, the girl looks somewhat fragile and thin even in the armor so she doesn't strike as a fighter who you depict it (fighters carry swords and wear armor). Her sword also seems very thin. She has a stature of a mage, cleric or something similar so I think you should depicted here as more magical angel and not a fighting one. The thing I like the most about this picture is a rare thing to see and that is the color of her wings. Majority of artist go for white wings. Wings of different colors add the mysticism of angel's purpose into play. The buildings in the background seem monumental and great but unfortunately they are mostly covered by her wings. Those are my 2 cents.